:root {
    --color-bg: #ffffff;
    --color-bg-muted: #f6f8fa;
    --color-bg-hero: linear-gradient(135deg, #0d1117 0%, #161b22 50%, #1a2332 100%);
    --color-text: #24292f;
    --color-text-muted: #57606a;
    --color-text-inverse: #ffffff;
    --color-border: #d0d7de;
    --color-accent: #0969da;
    --color-accent-hover: #0550ae;
    --color-dotnet: #512bd4;
    --color-success: #1a7f37;
    --color-card-shadow: rgba(31, 35, 40, 0.08);
    --nav-height: 64px;
    --radius: 8px;
    --radius-lg: 12px;
    --max-width: 1100px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #0d1117;
        --color-bg-muted: #161b22;
        --color-text: #e6edf3;
        --color-text-muted: #8b949e;
        --color-border: #30363d;
        --color-accent: #58a6ff;
        --color-accent-hover: #79b8ff;
        --color-card-shadow: rgba(0, 0, 0, 0.3);
    }

    .hero {
        background: linear-gradient(135deg, #010409 0%, #0d1117 50%, #161b22 100%);
    }

    code, pre {
        background-color: #161b22;
        border-color: #30363d;
    }

    .feature-card,
    .pattern-card,
    .faq-item,
    .adr-card,
    .code-block {
        background-color: #161b22;
        border-color: #30363d;
    }

    .site-header {
        background-color: rgba(13, 17, 23, 0.95);
        border-bottom-color: #30363d;
    }
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-height) + 16px);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

a {
    color: var(--color-accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.container-narrow {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--nav-height);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--nav-height);
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.logo {
    font-weight: 700;
    font-size: 1rem;
    color: var(--color-text);
    text-decoration: none;
    white-space: nowrap;
}

.logo:hover {
    text-decoration: none;
    color: var(--color-accent);
}

.logo-dotnet {
    color: var(--color-dotnet);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    list-style: none;
}

.nav-links a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
}

.nav-links a:hover {
    color: var(--color-accent);
    text-decoration: none;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-toggle {
    display: none;
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 6px 10px;
    cursor: pointer;
    color: var(--color-text);
    font-size: 1.25rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid transparent;
    cursor: pointer;
    transition: background-color 0.15s, border-color 0.15s, transform 0.1s;
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-1px);
}

.btn-primary {
    background-color: var(--color-accent);
    color: #ffffff;
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    color: #ffffff;
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-bg-muted);
    color: var(--color-text);
}

.btn-hero-primary {
    background-color: #ffffff;
    color: #0d1117;
    border-color: #ffffff;
}

.btn-hero-primary:hover {
    background-color: #f0f0f0;
    color: #0d1117;
}

.btn-hero-secondary {
    background-color: transparent;
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-hero-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

.btn-sm {
    padding: 0.4rem 0.875rem;
    font-size: 0.85rem;
}

/* Hero */
.hero {
    background: var(--color-bg-hero);
    color: var(--color-text-inverse);
    padding: 4rem 0 5rem;
}

.hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.hero-badge {
    display: inline-block;
    background-color: rgba(81, 43, 212, 0.3);
    color: #c4b5fd;
    border: 1px solid rgba(81, 43, 212, 0.5);
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 1rem;
    border: none;
    padding: 0;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.85);
    max-width: 640px;
    margin-bottom: 1.5rem;
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.hero-badges img {
    height: 20px;
    margin: 0;
}

.hero-ctas {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.hero-proof {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
}

.hero-proof a {
    color: rgba(255, 255, 255, 0.85);
}

/* Sections */
.section {
    padding: 4rem 0;
}

.section-alt {
    background-color: var(--color-bg-muted);
}

.section-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.section-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    border: none;
    padding: 0;
}

.section-header p {
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Feature grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
}

.feature-card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: 0 1px 3px var(--color-card-shadow);
    transition: box-shadow 0.2s, transform 0.2s;
}

.feature-card:hover {
    box-shadow: 0 4px 12px var(--color-card-shadow);
    transform: translateY(-2px);
}

.feature-icon {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.feature-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin: 0;
}

/* Pattern cards */
.pattern-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
}

.pattern-card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
}

.pattern-card h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.pattern-card p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin: 0;
}

/* Architecture diagram */
.diagram-wrapper {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.diagram-caption {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: 0.75rem;
}

/* Audience list */
.audience-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    list-style: none;
}

.audience-list li {
    padding: 1rem 1.25rem;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.9rem;
}

/* Code block */
.code-block {
    position: relative;
    background-color: var(--color-bg-muted);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.code-block-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.copy-btn {
    background: none;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: 0.2rem 0.6rem;
    font-size: 0.75rem;
    cursor: pointer;
    color: var(--color-text-muted);
    transition: background-color 0.15s;
}

.copy-btn:hover {
    background-color: var(--color-bg-muted);
    color: var(--color-text);
}

.copy-btn.copied {
    color: var(--color-success);
    border-color: var(--color-success);
}

.code-block pre {
    margin: 0;
    padding: 1rem 1.25rem;
    overflow-x: auto;
    background: transparent;
    border: none;
}

code {
    background-color: var(--color-bg-muted);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-size: 0.875em;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

pre code {
    background: transparent;
    padding: 0;
    font-size: 0.85em;
}

/* FAQ */
.faq-list {
    max-width: 720px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: 0.75rem;
    overflow: hidden;
    background-color: var(--color-bg);
}

.faq-question {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 1rem 1.25rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.faq-question::after {
    content: "+";
    font-size: 1.25rem;
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.faq-item.open .faq-question::after {
    content: "−";
}

.faq-answer {
    display: none;
    padding: 0 1.25rem 1rem;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.faq-item.open .faq-answer {
    display: block;
}

/* Related repos */
.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
}

.related-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    background-color: var(--color-bg);
}

.related-card h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.related-card p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: 0.75rem;
}

/* ADR pages */
.page-header {
    padding: 3rem 0 2rem;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    border: none;
    padding: 0;
}

.page-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.status-badge {
    display: inline-block;
    padding: 0.15rem 0.6rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.status-accepted {
    background-color: #dafbe1;
    color: #1a7f37;
}

.status-open {
    background-color: #fff8c5;
    color: #9a6700;
}

@media (prefers-color-scheme: dark) {
    .status-accepted {
        background-color: rgba(26, 127, 55, 0.2);
        color: #3fb950;
    }

    .status-open {
        background-color: rgba(154, 103, 0, 0.2);
        color: #d29922;
    }
}

.adr-grid {
    display: grid;
    gap: 1rem;
}

.adr-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    background-color: var(--color-bg);
    transition: box-shadow 0.2s;
}

.adr-card:hover {
    box-shadow: 0 4px 12px var(--color-card-shadow);
}

.adr-card h2 {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
    border: none;
    padding: 0;
}

.adr-card h2 a {
    color: var(--color-text);
    text-decoration: none;
}

.adr-card h2 a:hover {
    color: var(--color-accent);
}

.adr-card p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 0.75rem;
}

/* Article content (ADR body) */
.article-content h2 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    padding-bottom: 0.3em;
    border-bottom: 1px solid var(--color-border);
}

.article-content h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.article-content p,
.article-content ul,
.article-content ol {
    margin-bottom: 1rem;
}

.article-content ul,
.article-content ol {
    padding-left: 1.5rem;
}

.article-content li {
    margin-bottom: 0.35rem;
}

.article-content pre {
    background-color: var(--color-bg-muted);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem;
    overflow-x: auto;
    margin-bottom: 1rem;
}

.article-content pre code {
    font-size: 0.85em;
}

/* Footer */
.site-footer {
    background-color: var(--color-bg-muted);
    border-top: 1px solid var(--color-border);
    padding: 2.5rem 0;
    margin-top: 2rem;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 1.5rem;
    align-items: center;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    list-style: none;
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.footer-copy {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* Mobile nav */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        background-color: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        padding: 0.5rem 0;
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        padding: 0.75rem 24px;
        width: 100%;
    }

    .nav-actions .btn-sm {
        display: none;
    }

    .hero {
        padding: 2.5rem 0 3rem;
    }

    .section {
        padding: 2.5rem 0;
    }

    .hero-ctas {
        flex-direction: column;
    }

    .hero-ctas .btn {
        width: 100%;
        text-align: center;
    }
}